Numbers k such that the sign of core(k)-phi(k) is not equal to 2*mu(k)^2-1, where core(k) is the squarefree part of k.

A070237

Numbers k such that the sign of core(k)-phi(k) is not equal to 2*mu(k)^2-1, where core(k) is the squarefree part of k.

Terms

    a(0) =1a(1) =420a(2) =660a(3) =780a(4) =840a(5) =1320a(6) =1560a(7) =4620a(8) =5460a(9) =7140a(10) =7980a(11) =8580a(12) =9240a(13) =9660a(14) =10920a(15) =11220a(16) =12012a(17) =12180a(18) =12540a(19) =13020a(20) =13260a(21) =14280a(22) =14820a(23) =15180a(24) =15540a(25) =15708a(26) =15960a(27) =17160a(28) =17220a(29) =17556

External references